blob: 69196b0a1a4db0cd63cc8b4e92a1c4ad4537ed0f
1 | /* |
2 | * D-Cinema audio demuxer |
3 | * Copyright (c) 2005 Reimar Döffinger |
4 | * |
5 | * This file is part of FFmpeg. |
6 | * |
7 | * FFmpeg is free software; you can redistribute it and/or |
8 | * modify it under the terms of the GNU Lesser General Public |
9 | * License as published by the Free Software Foundation; either |
10 | * version 2.1 of the License, or (at your option) any later version. |
11 | * |
12 | * FFmpeg is distributed in the hope that it will be useful, |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | * Lesser General Public License for more details. |
16 | * |
17 | * You should have received a copy of the GNU Lesser General Public |
18 | * License along with FFmpeg; if not, write to the Free Software |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
20 | */ |
21 | |
22 | #include "libavutil/channel_layout.h" |
23 | #include "avformat.h" |
24 | |
25 | static int daud_header(AVFormatContext *s) { |
26 | AVStream *st = avformat_new_stream(s, NULL); |
27 | if (!st) |
28 | return AVERROR(ENOMEM); |
29 | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
30 | st->codecpar->codec_id = AV_CODEC_ID_PCM_S24DAUD; |
31 | st->codecpar->codec_tag = MKTAG('d', 'a', 'u', 'd'); |
32 | st->codecpar->channels = 6; |
33 | st->codecpar->channel_layout = AV_CH_LAYOUT_5POINT1; |
34 | st->codecpar->sample_rate = 96000; |
35 | st->codecpar->bit_rate = 3 * 6 * 96000 * 8; |
36 | st->codecpar->block_align = 3 * 6; |
37 | st->codecpar->bits_per_coded_sample = 24; |
38 | return 0; |
39 | } |
40 | |
41 | static int daud_packet(AVFormatContext *s, AVPacket *pkt) { |
42 | AVIOContext *pb = s->pb; |
43 | int ret, size; |
44 | if (avio_feof(pb)) |
45 | return AVERROR(EIO); |
46 | size = avio_rb16(pb); |
47 | avio_rb16(pb); // unknown |
48 | ret = av_get_packet(pb, pkt, size); |
49 | pkt->stream_index = 0; |
50 | return ret; |
51 | } |
52 | |
53 | AVInputFormat ff_daud_demuxer = { |
54 | .name = "daud", |
55 | .long_name = NULL_IF_CONFIG_SMALL("D-Cinema audio"), |
56 | .read_header = daud_header, |
57 | .read_packet = daud_packet, |
58 | .extensions = "302,daud", |
59 | }; |
60 |